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import Timer from './abstract_timer';
import TimedCallback from './timed_callback';
import { Delay } from './scheduling';

// We need to bind clear functions this way to avoid exceptions on IE8
function clearTimeout(timer) {
  global.clearTimeout(timer);
}
function clearInterval(timer) {
  global.clearInterval(timer);
}

/** Cross-browser compatible one-off timer abstraction.
 *
 * @param {Number} delay
 * @param {Function} callback
 */
export class OneOffTimer extends Timer {
  constructor(delay: Delay, callback: TimedCallback) {
    super(setTimeout, clearTimeout, delay, function(timer) {
      callback();
      return null;
    });
  }
}

/** Cross-browser compatible periodic timer abstraction.
 *
 * @param {Number} delay
 * @param {Function} callback
 */
export class PeriodicTimer extends Timer {
  constructor(delay: Delay, callback: TimedCallback) {
    super(setInterval, clearInterval, delay, function(timer) {
      callback();
      return timer;
    });
  }
}